- Explain observation and experimentation with help of an example. What are different sources of secondary data information? (2 Marks)
- What are the essential differences among nominal, ordinal, interval, and ratio scales? (1.5 Marks)
- Discuss Sample versus Census. Describe the differences between a probability sampling and a non-probability sampling. (2 Marks)
4. Distinguish between: (1.5 Marks)
a. Direct and indirect questions
b. Open ended and closed questions
c. Research, investigative, and measurement questions
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